The Best Free Gravel Driveway Calculator (2026)
A gravel driveway is one of the easier DIY jobs to plan — but only if the calculator you use answers the questions that actually come up when you order: how many tons, how many truck loads, how much to add for compaction, and roughly what it will cost. Here is what to look for, and how the main free tools stack up.
What a gravel driveway calculator should give you
- Volume and weight. Cubic yards and tons — volume tells you if it fits, tons is how it is sold and delivered.
- Truck loads. Your total expressed in standard 10-ton dump-truck loads, so you can check a delivery quote at a glance.
- A waste / compaction allowance. Loose gravel settles 10–20%. The calculator should add for it, not leave you to remember.
- Separate base and top layers. A real driveway is a compactable base (crusher run) with an optional decorative surface — priced and sized separately.
- Gravel types with the right density. Crushed stone, crusher run, pea gravel and river rock all weigh differently per cubic foot.
- A cost range. Materials self-hauled vs. delivered-and-spread, as a range with a date — not a single number presented as fact.
- A material list you can take to the yard, and a layout that works on a phone.
How the main free calculators compare
Based on the public tools as of September 2026 — features change, so check the live tool.
| Feature | Build Material Planner | Inch Calculator | Omni Calculator |
|---|---|---|---|
| Cubic yards + tons | Yes | Yes | Yes |
| Dump-truck loads | Yes | No | No |
| Waste / compaction allowance built in | Yes (10%, adjustable) | No (guide says add 10%) | No |
| Base + optional top layer | Yes | No | No |
| Multiple gravel types / densities | Yes (4) | No (single density) | Yes (presets + custom) |
| Cost estimate | Range: self-haul vs. delivered & spread | Single figure (enter price) | Single figure (enter price) |
| Printable material list | Yes | No | No |
| Driveway-specific | Yes | Yes | No (generic gravel tool) |
| Formula shown | Yes | Yes | Yes |
Notes on each
Inch Calculator — clean, well-explained, driveway-specific, and it shows the math. It returns cubic yards, tons and an optional cost, but it works from a single depth and one density, so you handle layers, compaction and gravel-type differences yourself.
Omni Calculator — the most flexible on material: preset densities for regular gravel, pea gravel and crushed stone plus a custom-density field, and unit switching. It is a generic gravel tool, though — no driveway layers, no compaction allowance, no truck loads or material list.
The Calculator Site, HomeAdvisor and others — fine for a quick cubic-yards figure. Beyond that they are thin, and the top of this search result is now crowded with near-identical AI-built calculator sites; most stop at volume and a single cost number.
Our take
For an actual driveway project we built the Gravel Driveway Calculator to answer the ordering questions in one pass: cubic yards, tons and truck loads; a 10% compaction/waste allowance you can adjust; a separate compactable base and optional decorative top layer, each with its own gravel type and density; a cost range for self-haul vs. delivered-and-spread with the price date shown; and a printable material list. It shows every formula and assumption it used. That is more to read than a one-box calculator — the trade is that you can take the output straight to a supplier.
Frequently asked questions
Cubic yards or tons — which do I order gravel in?
Both matter. Suppliers usually sell and deliver by the ton, but volume (cubic yards) is what tells you if it fits the area. A good calculator gives you both, plus how many standard dump-truck loads that is. Roughly, one cubic yard of driveway gravel weighs 1.3–1.5 tons.
Do I need to order extra for compaction?
Yes. Loose gravel compacts down 10–20% once it is graded and driven on, and some is always lost to spillage and the subgrade. Order about 10% over the raw volume — a calculator that builds in a waste allowance does this for you.
How many tons of gravel are in a truck load?
A standard single-axle dump truck carries around 10 tons; tri-axle trucks carry more. Knowing your total in truck loads is the quickest way to sanity-check a delivery quote.
Is a free online calculator accurate enough to order from?
For planning and budgeting, yes — the geometry is simple and the density figures are well established. Treat the cost figure as a national-average range, not a local quote, and confirm the final quantity and price with your supplier before ordering.